MLB: Highest ABS Challenge Success Rate (Team)

Platform comparison

Market context

The 2026 MLB season has introduced the Automated Ball-Strike (ABS) challenge system, allowing batters, pitchers and catchers to contest umpire calls on ball or strike decisions. This market bets on which team will achieve the highest challenge success percentage during the regular season, with a current crowd-implied probability of 36% favouring the "YES" outcome. On Polymarket, this contract is priced in USDC on the Polygon network, utilising conditional tokens to resolve the outcome once the settlement window closes on 11 October 2026.

Historical data from the first three weeks of the 2026 season shows significant variance in team performance, with nine clubs exceeding a 60% success rate while the Reds lead the pack comfortably [1]. Over 1,143 challenges have been made, with 619 deemed successful, yielding an overall overturn rate of 54% [1]. However, success is not uniform; teams lose their ability to challenge after two incorrect attempts, creating a strategic dependency where confidence and accuracy directly impact win percentages [2]. This variability frames the current 36% probability as a reflection of the high uncertainty in predicting which team will maintain consistency over the full season.

Traders should monitor the ABS challenge tracker for emerging team rankings and player-specific success rates, as better players correlate with higher challenge confidence [5][9]. Key catalysts include announcements regarding rule adjustments or system updates, alongside schedule dependencies that may affect challenge frequency for teams with more home games. Recent data updated through 8 July highlights William Contreras of Milwaukee leading with a 53.2% success rate, suggesting that individual player performance could drive team outcomes [9]. Monitoring these real-time metrics on baseballsavant.com will provide the most reliable indicators for future price movements.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track MLB: Highest ABS Challenge Success Rate (Team) across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like PolyGram trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.